This vintage 1933 Radio City Products Co. Tube tester, model 303A, is a great addition for any collector or enthusiast of analog electronics. Produced in the United States, it is a rare find and a testament to the quality of American manufacturing. The brand is Radio City Products, and the features include analog display. This item falls under the categories of Business & Industrial, Test, Measurement & Inspection, and Test Meters & Detectors.